When I was in seventh grade, Helen arrived in my New England town. We locals had never seen anything like her. She was from New Jersey. She wore hip-hugger bell-bottoms, knew sexy line dances, smoked cigarettes, and had actually kissed a boy.

She was also mean. She befriended me initially -- perhaps because I lived next door and she needed a friend. But once she realized I was a shy bookworm, she dropped me. Then she laughed at my clothes (in my face) and started rumors about me (behind my back).

Eventually I learned to ignore her. But the pain of her rejection haunted me for years. It even made me distrustful of "girl groups" long into adulthood.

The topic of girl bullying is not new. Dozens of lay books and scholarly journals have explored the ways "relational aggression -- tactics such as exclusion, rumor mongering, and Internet harassment -- can damage girls' self-esteem. But only recently have researchers begun looking at what bullying does to the bullies themselves. The news is not good.

The Impact of Bullying

In the short term, girl bullies often are rejected by peers and lack meaningful relationships, notes Charisse Nixon, PhD, co-author of Girl Wars: 12 Strategies That Will End Female Bullying and an assistant professor of developmental psychology at Pennsylvania State University in Erie.

In the long term, "these girls learn to manipulate people like chess pieces," Nixon says. "Unfortunately, this can harm their ability to have meaningful relationships and successful careers."

Some characteristics of a girl bully are jealousy, feelings of superiority, poor impulse control, and lack of empathy. Nixon believes girls bully when their basic needs of "ABCs, and me" -- acceptance (by self), belonging (among others), control, and meaningful existence -- are thwarted. "These needs apply to everyone," she notes, "children and adults." People will do what they need to do to get those needs met.

Prevent Bullying

Whatever the cause of bullying, researchers are now focusing on prevention -- including counseling to get at the root of the need to bully; teaching healthy communication skills; and introducing schoolwide antibullying programs.

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